From: Matt S Trout <mst@shadowcat.co.uk>
Date: Mon, 30 Sep 2019 17:43:50 +0000 (+0000)
Subject: document func expander
X-Git-Tag: v2.000000~3^2~85
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=392d843161e32763b00f56d14a669fb98d5710f8;p=dbsrgits%2FSQL-Abstract.git

document func expander
---

diff --git a/lib/SQL/Abstract/Reference.pm b/lib/SQL/Abstract/Reference.pm
index 4752cbe..b030f39 100644
--- a/lib/SQL/Abstract/Reference.pm
+++ b/lib/SQL/Abstract/Reference.pm
@@ -695,4 +695,21 @@ not, expands the argument values:
   foo = ?
   [ 3 ]
 
+=head2 func
+
+Expands the argument values:
+
+  # expr
+  { -func => [ 'coalesce', { -ident => 'thing' }, 'fallback' ] }
+
+  # aqt
+  { -func => [
+      'coalesce', { -ident => [ 'thing' ] },
+      { -bind => [ undef, 'fallback' ] },
+  ] }
+
+  # query
+  COALESCE(thing, ?)
+  [ 'fallback' ]
+
 =cut